Well went and played with them since it's now dark.. Don't see a problem backing into the pole barn now! Did notice it might not hurt to polish the lenses a liittle though..

And just for grins I popped the holder into the tail light. In case anyone wonders about white LED's in that position.. it washes out to a slight shade of orange tint.

These are bright enough to be brake lights, and would slightly blind someone behind you at the right angle. Yeah I got down and looked.. LOL.